Two-stage combustor for gas turbine engine

A combustor for a gas turbine engine, comprising:

• an inner liner wall including a radial inner liner wall portion at a first axial forward end of the inner liner wall and an axial aft inner liner wall portion at a first axial aft end of the inner liner wall;
• an outer liner wall including a radial outer liner wall portion at a second axial forward end of the outer liner wall and an axial aft outer liner wall portion at a second axial aft end of the outer liner wall, the outer liner wall circumscribing the inner liner wall, and a combustion chamber formed between the inner liner wall and the outer liner wall:
• a forward dome wall connected to and projecting axially out from the inner liner wall at the first axial forward end of the inner liner wall, the forward dome wall configured with an array of forward injection bores extending radially through the forward dome wall:
• an aft dome wall connected to and projecting axially out from the outer liner wall at the second axial forward end of the outer liner wall, the aft dome wall configured with an array of aft injection bores extending radially through the aft dome wall:
• an intermediate wall connected to the forward dome wall and the aft dome wall, the intermediate wall extending radially outward from an axial aft end of the forward dome wall to an axial forward end of the aft dome wall;
• and
• a mixer wall projecting radially inward from a radially inner end of the intermediate wall, the mixer wall configured with an array of axial forward facing valleys and an array of axial aft facing valleys, wherein a first forward injection bore in the array of forward injection bores is circumferentially aligned with a first forward facing valley in the array of axial forward facing valleys, and a first aft injection bore in the array of aft injection bores is circumferentially aligned with a first aft facing valley in the array of axial aft facing valleys;
• wherein the mixer wall comprises a panel of material;
• wherein the panel of material has a thickness that extends between a forward surface of the panel of material and an aft surface of the panel of material;
• wherein the forward surface of the panel of material forms the array of axial forward facing valleys;
• and
• wherein the aft surface of the panel of material forms the array of axial aft facing valleys.